Antimation-how to make object visible then invisible
In Blender Internal you may achieve it keyframing the alpha transparency values. E.g. in frame 1 hover the cursor over the Alpha slider with the value set to 1.000 and press I to keyframe it. Then go to frame 2, change the alpha value to 0.000 and keyframe it again.


In Cycles you can keyframe the Fac value of the Mix Shader (which mixes your shader with Transparent shader).